/* intSync.c - a program to demonstrate synchronizing among tasks *             running on multiple CPUs by using interrupts across *             the VME backplane. *//* Copyright 1984-1997 Wind River Systems, Inc. *//*modification history--------------------01c,06nov97,mm  added copyright.01b,17sept97,ram added include files stdio.h, sysLib.h, logLib.h, intLib.h		 casted semGive to be a VOIDFUNCPTR in function intInit()		 01a,14jan92,ms   written.*/#include "vxWorks.h"#include "semLib.h"#include "iv.h"#include "intGen.h"#include "stdio.h"#include "sysLib.h"#include "logLib.h"#include "intLib.h"LOCAL SEM_ID semId;          /* semaphore ID */LOCAL void intInit (void);/*initialize for synchronization with VME interrupt*//***************************************************************************** * intSync - Synchronize with VME bus interrupt * * DESCRIPTION * * This task is used for synchronization with VME bus interrupt generated by * CPU 0. * * The intSync task runs on CPU1, intGen task runs on CPU 0 * * EXAMPLE * * The following is an example from VxWorks shell: * * -> sp (intSync) * */void intSync (void)    {    /* initialize for synchronization */    intInit ();    FOREVER        {        printf ("CPU 1: Waiting to be synchronized by VME bus interrupt from CPU 0\n");        if (semTake (semId, WAIT_FOREVER) == ERROR)            {            perror ("intSync: semTake failed");            return;            }         printf ("\nSynchronization done\n");        /* Do the work that need to be synchronized */        printf ("RUNNING\n\n\n");        }    }/***************************************************************************** * intHdlr - interrupt handler for I960 architecture targets. I960  *           architecture targets need to acknowledge the bus interrupt in *           software. *            */void intHdlr    (    SEM_ID semId    )    {    /*unsigned char vec = sysBusIntAck (1);*/    logMsg ("intHdlr:: acknowledging interrupt\n",0,0,0,0,0,0);    semGive (semId);    }/***************************************************************************** * intInit - initialize for synchronization with VME bus interrupt * * DESCRIPTION * * This task does necessary initialization for synchronization with VME * bus interrupt generated by CPU 0. */LOCAL void intInit (void)    {    /* set up semaphore for synchronization */    if ((semId = semBCreate (SEM_Q_PRIORITY, SEM_EMPTY)) == NULL)        {        perror ("intInit: semBCreate failed");        return;        }    /* enable interrupts                  */    if (sysIntEnable (INTLEVEL) == ERROR)        {        printf ("intInit: Error in enabling interrupts\n");        return;        }    /* connect semGive to the hardware interrupt */#if (CPU_FAMILY == I960)    /*  connect the interrupt handler (that calls semGive) to the hardware      *  interrupt      */    if (intConnect ((VOIDFUNCPTR *) INUM_TO_IVEC (INTNUM),                                              intHdlr, semId) == ERROR)        {        perror ("intInit: Error in connecting to the ISR");        return;        }#endif#if (CPU_FAMILY == MC680X0)    if (intConnect ((VOIDFUNCPTR *) INUM_TO_IVEC (INTNUM),                                             (VOIDFUNCPTR) semGive, (int)semId) == ERROR)        {        perror ("intInit: Error in connecting to the ISR");        return;        }#endif#if (CPU_FAMILY == SPARC)    if (intConnect ((VOIDFUNCPTR *) INUM_TO_IVEC (INT_NUM_INTSYNC),                                              semGive, semId) == ERROR)        {        perror ("intInit: Error in connecting to the ISR");        return;        }#endif    }